2-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTO DIRECTION

SENSING

DESCRIPTION

The UTXB0102 device is a 2-bit noninverting translator that uses

two separate configurable power-supply rails. The A port is designed

to track VCCA. VCCA accepts any supply voltage from 1.2V to 3.6V. The

B port is designed to track VCCB. VCCB accepts any supply voltage from

1.65V to 5.5V. This allows for universal low-voltage bidirectional

translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V

voltage nodes. VCCA must not exceed VCCB.

When the output-enable (OE) input is low, all outputs are placed in

the high-impedance state.

This device is fully specified for partial-power-down applications

using IOFF. The IOFF circuitry disables the outputs when the device is

powered down. This inhibits current backflow into the device which

prevents damage to the device.

OE must be tied to GND through a pull-down resistor to assure the

high-impedance state during power up or power down; the minimum

value of the resistor is determined by the current-sourcing capability of

the driver.

FEATURES

* 1.2V to 3.6V on A Port and 1.65V to 5.5V on B Port (VCCA ≤ VCCB)

* VCC Isolation Feature – If Either VCC Input Is at GND, All Outputs Are in the High-Impedance State

* OE Input Circuit Referenced to VCCA

* Low Power Consumption, 4μA Max ICC

* IOFF Supports Partial-Power-Down Mode Operation